Spatiotemporal dynamics of soil phosphorus and crop uptake in global cropland during the 20th century
| Autor: | J. Zhang, A. H. W. Beusen, D. F. Van Apeldoorn, J. M. Mogollón, C. Yu, A. F. Bouwman |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Biogeosciences, Vol 14, Iss 8, Pp 2055-2068 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1726-4170 1726-4189 2055-2017 |
| DOI: | 10.5194/bg-14-2055-2017 |
| Popis: | Phosphorus (P) plays a vital role in global crop production and food security. In this study, we investigate the changes in soil P pool inventories calibrated from historical countrywide crop P uptake, using a 0.5-by-0.5° spatially explicit model for the period 1900–2010. Globally, the total P pool per hectare increased rapidly between 1900 and 2010 in soils of Europe (+31 %), South America (+2 %), North America (+15 %), Asia (+17 %), and Oceania (+17 %), while it has been stable in Africa. Simulated crop P uptake is influenced by both soil properties (available P and the P retention potential) and crop characteristics (maximum uptake). Until 1950, P fertilizer application had a negligible influence on crop uptake, but recently it has become a driving factor for food production in industrialized countries and a number of transition countries like Brazil, Korea, and China. This comprehensive and spatially explicit model can be used to assess how long surplus P fertilization is needed or how long depletions of built-up surplus P can continue without affecting crop yield. |
| Databáze: | Directory of Open Access Journals |
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